Review

Open a FileInputStream on a non-existing file throws.

Check File.exists() first.

• missing/condition/value_or_state

FISExists.java

misuse(File)

class FISExists {
	public void misuse(File file) throws IOException {
		try (FileInputStream fis = new FileInputStream(file)) {
		  // do something with fis...
		}
	}

}

public class CheckFileExists {
	public void pattern(File file) throws IOException {
		if (file.exists()) {
			try (FileInputStream fis = new FileInputStream(file)) {
        // do something with fis...
      }
		}
	}
}